1. Preface; 2. Introduction; 3. Certainty: the conceptual differential; 4. Certainty: its conceptual differential in Accessible World Semantics (by Abraham, Werner); 5. Modes of modality in an Un-Cartesian framework (by Leiss, Elisabeth); 6. (Un)Certainty as attitudinality; 7. Counter-argumentation and modality (by Lo Cascio, Vincenzo); 8. Explanation as a certainty marker in persuasive dialogue (by Dufour, Michel); 9. How to deal with attitude strength in debating situations. A survey on forewarning, argument strength, repetition, and source credibility as mediators of uncertainty (by De Conti, Manuele); 10. The role of subjective certainty in the epistemology of testimony: a contextualist perspective (by Croce, Michel); 11. Uncertainty in polar questions and certainty in answers? (by Kleiber, Judit); 12. Lying as a scalar phenomenon: insincerity along the certainty-uncertainty continuum (by Marsili, Neri); 13. Persuasion pragmatic strategies in L1/L2 Italian argument-ative speech (by Salvati, Luisa); 14. Dialogical exchange and speech acts; 15. What do I know as yet? (by Hundsnurscher, Franz); 16. On polar questions, negation, and the syntactic encoding of epistemicity (by Cantarini, Sibilla); 17. Epistemic uncertainty and the syntax of speech acts (by Judge, Kate E.); 18. Discursive functions of evidentials and epistemic modals (by Oishi, Etsuko); 19. Onomasiology; 20. Vagueness, unspecificity, and approximation. Cognitive and lexical aspects in English, Swedish, and Italian (by Allwood, Jens); 21. Latin commitment-markers: scilicet and videlicet (by Schrickx, Josine); 22. Italian come se "as if": evidential and epistemic aspects (by Zuczkowski, Andrzej); 23. Applications in exegesis and religious discourse; 24. The communication of certainty/uncertainty within a Gospel passage (John 9:1-41) (by Salvato, Lucia); 25. Rhetorics of (un)certainty in religious discourse (by Scardigno, Rosa); 26. Subject index